I was going to make a full post about this game, but life has gotten in the way. This may or may not be a placeholder. Regardless, you should play this game.
ALSO, GO INTO IT BLIND. I will tell you that the warnings at the beginning of the game have weight to them. It looks like a cutesy Visual Novel, but it....well, it's not. If you aren't a fan of Visual Novels (or harem-style anime), just keep playing through it.
Yes, it's a horror game. No, I won't tell you anything else. Just play it. It's free on Steam and absolutely worth it.
The trailers tell you not